going dirt riding with my 9yr old boy,no time or money to do both so there it goes!
It sounds to me you've picked the best way to ride....with someone you love and who looks to you for clues of what a real man is and how he thinks and reacts to the world around him. Your time with him is truly priceless so enjoy every moment. I didn't start riding until I was 15 and now, pushing 60, I can remember the times my dad and I rode our bikes together along the American River near Sacramento and when we would go camping in the Sierras (His Triumph Tiger Cub and my Parilla 250 scrambler). I cannot emphasize enough the word
priceless!
Who knows where this "time" will lead. It may well be that he will convert to a street rider and you will also be able to share that passion with him. As one who had a 20+ year hiatus (because I thought it too risky vs. being the sole adult)while raising my daughter as a single parent, though you may have to wait for time to pass, if this is a passionate hobby for you, then it will come full circle and avail itself to you once again. Until then, there is no joy in this world that will compare to the fruits of your time and energy invested in your child. I am amazed every day at the adult mine has become and wouldn't trade or try to compare anything I've set aside for her.
I do understand the ache in your heart as I sold 2 motorcycles when I was suddenly the "only" parent in the house, but I leave you with this encouragement: It will all be worth it in the end.